The code is installed fine but it's not counting any visitors for some reason.

If the code is installed fine it may just be that no new visitors have come to your site yet.

Did you configure StatCounter counter to block your visits with a cookie, or to block them based on your IP address?

Try to get a friend to visit your website, and see if they get recorded.

If that doesn't work then you may also have other javascript that comments out our code by accident. Or perhaps some badly formed HTML. If it still doesn't work, then create a very basic test page to see if it works on that page. Or you can also try moving the StatCounter code nearer to the top of the page.